QUOTE(PF T.J. @ Nov 28 2012, 10:01 PM)
Thank you for the explanation sifu

I still get quite a long focal length range when I attach the 18-105mm to the D600 right? haha
Sorry for the noob questions~
I have no idea what lens to get even if I get the D600 also

Added on November 28, 2012, 10:05 pmThank you for the reply too sifu

I would love to have a lens for everything (like the 18-105mm one I already have haha)

Thanks for the link, will look into it, and hopefully I will not be the noob who spent money for the "wrong" lenses

Me not sifu bro~
Forgot to mention to you, if you mount DX lens on FX body, it will use CROP Mode, so yes you will get same long focal length as when you attach to DX Body, BUT... it will not have 24MP file. Crop Mode will give you about 10.5MP (which is still good enough already). For D800, Crop Mode will give around 15.4MP file.
For the lens suggestions, if depends on your budget and what you want to use the camera for.
If you're shooting a lot in low light situations and want a versatile lens, and have the budget... Nikon 24-70mm f/2.8
If not, the 24-85mm f/3.5-4 is already very good for general use... (correction: new version should be f/3.5-4.5 G)
You can get a prime lens if you need one for low light and portraits.
It really depends on the purpose you want to use the camera for and your budget.
Also note that FX will have more shallow DOF, which means, if you use large aperture, you may notice harder to get more things in focus compare to smaller sensor, and you may also keep getting many OOF if you using very large aperture and you're not used to it yet.
QUOTE(tongweng @ Nov 28 2012, 10:20 PM)
umm DX is x1.5 and FX is actual...is it saying that DX is better then FX if i use it to take picture for landscape? but for close range like food it will be blur?
Not really sure what you meant.
Basically, FX is larger sensor, means the Depth of Field (DOF) is more shallow, so it's harder to get more things in focus. So if you're shooting landscape, you may experience and notice less is in focus comparing to when you're using DX.
Like Agito mentioned, if you use a digital camera or handphone camera which has small sensor, you can simply take a photo and you many things will be in focus. A handphone camera, using f/2.8, you can also see many things in focus. BUT, it also depends how you see, whether you're pixel peeping on the overall image quality or just want to get something that's in focus and viewable on screen.
This post has been edited by Andy214: Nov 29 2012, 11:44 AM